Tool for dressing, shaping, and cleaning rubber erasers.



No.850,337. PATENTEDAPR.16,1907.

' G. H. BLAKESLEY. TOOL FOR DRESSING, SHAPING, AND CLEANING RUBBER ERASERS.

APPLICATION FILED JUNE 23, 1906.

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Wiiflesses f/M/ M ITFD STATES PATENT OFFICE.

GILBERT H. BLAKESLEY, OF BRISTOL, CONNECTICUT, ASSIGNOR TO THE BLAKESLEY NOVELTY COMPANY, OF BRISTOL, CONNECTICUT, A COR- PORATION OF CONNECTICUT.

TOOL FOR DRESSING, SHAPING, AND CLEANING RUBBER ERASERS.

Specification of Letters Patent.

Patented April 16, 1907.

Applicationfil edJune23. 1906. SeTialNo 823.048.

To (LU w/tont 7,11; nuty concern:

Be it known that I, GILBERT H. Bnuucs- LEY, a citizen of the United States, residing at Bristol, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Tools for Dressing, Shaping, and Cleaning Rubber Erasers; and I do here by declare the following to be a full, clear, and exact description of the invention, such will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a tool for dressing, shaping, and cleaning the edges of rubber erasers, and more particularly adapted for use with the well-known. circular eraser, such as are in general use by type-writer opera tors.

As is well known, these erasers comprise a metallic holder consisting of two metallic disks held together by a tubular rivet or eyelet, between which disks is clamped a circular ring, of rubber, which projects some distance beyond the peripheries of the metal disks and which has its peripheral edge rounded or formed V-shaped, so that in use a single letter of type-written matter may be erased without the liability of defacing the adjacent letters. In use, however, the peripheral edge of the rubber eraser becomes worn and dulled, as it were, so that it cannot be used to erase a single letter from a word without danger of blurring and marring adjacent letters, and, furthermore, the edge of the eraser becomes more or less soiled or stained with the anilin ink usually carried by typewriter ribbons, and which, unless removed,

will smear, blur, and mar the appearance of a typewritten sheet should it be used thereon.

The object of the present invention, therefore, is to produce a simple and efficient tool for dressing and shaping the peripheral edge of a circular eraser as it becomes worn and to clean the surface, thus prolonging the life of the eraser and keeping it in good condition.

To the above ends the present invention consists of the improved tool which will now be described and claimed.

My invention is illustrated in the accompanying drawings, in which Figure 1 shows in front elevation a circular eraser with my improved tool applied thereto in position for shaping and cleaning the edge and showing in dotted lines the manner of manipulating the tool. Fig. 2 shows a view similar to Fig. 1, but turned around to show the opposite side. Fig. 3 shows in side elevation the eraser and tool. Fig. 4 shows a vertical section view of the tool, taken on the dotted line a; .r, Fig. 5. Fig. 5 shows a vertical sectional View taken on the dotted line y y, Fig. 4, but showing the stud or fulcrum in elevation. F 6 shows in plan view a blank from which my improved tool is niiaimfactured. Fig. 7 shows a side elevation of a modified form of tool. Fig. 8 shows a vertical sectional view on the line ,2 Fig. 7.

Similar reference characters will be employed throughout the specification. and drawings to designate correspondingparts.

In the drawings is shown a circular rubber eraser of a type well known and which coinprises a circular rubber ring 1, clamped between the metallic disks 2 are held together at their centers by a tubular rivet or eyelet 4. The eraser thus described is one which has long been in general use. 7

My improved dressing, shaping, and cleaning tool comprises a shank portion 5, which near its lower end is provided with a slot 6, in which is freelymovable a stud or fulcrum 7, the stud or fulcrum 7 comprising a disk 8, provided with a cylindrical stud 9, which passes through the slot 6 and enters and is frictionally held in a cylindrical stud 10,.projecting from a flange 11. When the parts are fastened together, as shown in Fig. 5, the flanges 8 and 11 will be upon opposite sides of the shank 5, and the whole stud or fulcrum may be freely moved along the slot 6, for a purpose to be hereinafter described.

At the upper end of the shank 5 there is located the. dressing, shaping, and cleaning device overhanging the stud or fulcrum 7 and formed by bending the blank at right angles, as shown at 12, thence again at right angles, as shown at 13, forming the top and front of a box-like structure. The box-like structure comprises the. side walls 14, which are formed by bending down the wings 15. (See Fig. 6.) In the walls 14 are formed the substantially V-shaped notches 16, the edges of which are sharpened, as shown at 17. (See Fig: 4.) Attached to the top of the box-like and 3, which disks structure is a knob 18. In use the movable fulcrum 7 is inserted in the tubular eyelet 4 of the eraser and the shank 5 moved down or radially with relation to the peripheral edge of the eraser to bring the sharpened edges 17 in contact with the peripheral edge, whereupon grasping the knob 18 and imparting a circular movement to the device, as indi cated in dotted lines, Fig. 1., at the same time pressing it in contact with the peripheral edge of the eraser, the sharpened edges 17 will scrape away the sides of the peripheral edge, thus dressing and restoring to its original shape the worn edge of the eraser and removing therefrom ink stains or other foreign matter. It will be observed that the sliding fulcrum 7 permits of the device being used with circular erasers varying somewhat in diameter, of course within the range of movement of the fulcrum 7 with relation to the shaping device carried by the shank 5, and also that this adjustment provides for the following up of the peripheral edge of the eraser as it becomes worn away.

As shown in Figs. 7 and 8, instead of forming the dressing, shaping, and cleaning device 1 with the sharpened notches 16 it may be formed of two steel blocks 19, provided with -file-surfaces 20, inclined with relation to each other, so that when the blocks 19 are fastened together by the rivets 21 and to the shank 5 the file-surfaces 20 will form a substantially V-shaped groove or channel arranged to act upon the peripheral edge of the eraser in 1 l l l i l l a manner hereinbefore described. In this 1 form of the device the knob 22 may be secured in any suitable manner, as by provid ing it with a threaded shank 23, arranged to engage a threaded bearing in the blocks 19.

Having described my invention, 1 claim as new and desire to protect by Letters Patent of the United States 1. A tool for dressing, shaping and cleaning rubber erasers, comprising a shank, a stud or fulcrum projecting therefrom at one end and a device carried by said shank at its opposite end for acting upon the edge of the eraser, substantially as described.

2. A tool for dressing, shaping and cleaning erasers, comprising a shank carrying at one end a stud or fulcrum arranged to have a longitudinal adjustment along said shank, a block at the other end of the shank provided with substantially V-shaped notches and a knob or handle, substantially as described.

3. A tool for dressing, shaping and cleaning circular erasers, comprising a shank carrying at one end a longitudinally-adjustable stud or fulcrum and provided at its opposite end with the overhanging substantially 'V- shaped sharpened edges arranged to engage the peripheral edge of the eraser, substantially as described.

In testimony whereof I t'll'lX my signature in presence of two witnesses.

GILBERT H. BLAKESLEY.

Vitnesses:

WVILLIAM J. MATooN, ALICE E. BROWN. 

